PMN-PT single crystal is a novel pyroelectric material with superior performances. An 8×1 linear array was designed, and research on the key processes of device fabrication was carried out based on PMN-PT crystal. The responsivity of the 8×1 chip was about 280 V/W. At the same time, the 8×1 pyroelectric chip was coupled with an 8×1 read-out circuit. The performance of the 8×1 FPA was studied. The pyroelectric signal of the FPA device can’t be measured because the read-out circuits respond to visible light. The design of read-out circuits needs to be improved. The results of the paper lay a foundation for the development of large-scale uncooled pyroelectric FPA based on novel ferroelectric single crystals.